[PATCH v7 09/15] tools: fit_image_setup_sig: set required_keynode to -1

[Philippe Reynes]

When initializing info about a signature, set required_keynode
to -1 instead of 0, as 0 is a valid keynode offset.

Reviewed-by: Simon Glass <sjg at chromium.org>
Signed-off-by: Philippe Reynes <philippe.reynes at softathome.com>
---
v5:
- initial version
v6:
- no change
v7:
- change info->required_keynode > 0 to info->required_keynode >= 0
  in ecdsa_verify_hash

 lib/ecdsa/ecdsa-verify.c | 2 +-
 tools/image-host.c       | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/ecdsa/ecdsa-verify.c b/lib/ecdsa/ecdsa-verify.c
index e58b8892b98..22279a7cc84 100644
--- a/lib/ecdsa/ecdsa-verify.c
+++ b/lib/ecdsa/ecdsa-verify.c
@@ -111,7 +111,7 @@ static int ecdsa_verify_hash(struct udevice *dev,
 	if (!ops || !ops->verify)
 		return -ENODEV;
 
-	if (info->required_keynode > 0) {
+	if (info->required_keynode >= 0) {
 		ret = fdt_get_key(&key, info->fdt_blob, info->required_keynode);
 		if (ret < 0)
 			return ret;
diff --git a/tools/image-host.c b/tools/image-host.c
index 8b550af0dc1..f5681d6c1f9 100644
--- a/tools/image-host.c
+++ b/tools/image-host.c
@@ -198,6 +198,7 @@ static int fit_image_setup_sig(struct image_sign_info *info,
 	info->checksum = image_get_checksum_algo(algo_name);
 	info->crypto = image_get_crypto_algo(algo_name);
 	info->padding = image_get_padding_algo(padding_name);
+	info->required_keynode = -1;
 	info->require_keys = require_keys;
 	info->engine_id = engine_id;
 	if (!info->checksum || !info->crypto) {
-- 
2.43.0